Steam-turbine.



E. '3. MGGARTY.

STEAM Tummm.

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UNITED STATES PATENT OFFICE.

EUGENE J. MGCARTY, OF CLINTON, MASSACHUSETTS, ASSIGNOR TO THOMAS J.MGNAMARA, 0F CLINTON, MASSACHUSETTS.

STEAM-TURBINE.

Specification of `Letters Patent.

Patented Dec. 24, 1912.

To all 'whom 'it may concern:

Be it known that I, EUGENE J. MCCARTY, a citizen of the United States,residing at Clinton, in the county of Worcester and State ofMassachusetts, have invented a new and useful Steam-Turbine, of whichthe following is a specification.

The principal objects of this invention are to provide a construction ofsteam turbine in which the amount of power developed as compared withthe entire weight of the device shall be larger than has been the caseheretofore; to provide a construction .in which the vanes are formed inan exceedingly simple and inexpensive manner and formed integral withthe supporting plates therefor so that they shall be extremely strongand durable; also to provide an improved construction of casing for therotary vanes; and in general to improve and simplify the construction ofthe steam turbine.

Reference is to be had to the accompanying drawings in which- Figure 1is a central sectionalview of a steam turbine set up for the purpose ofoperating a blower. Fig. 2 is an end view of the same with parts shownin section and one end plate removed. Fig. 3 is a view of the innersurface of the other end plate. Fig. 4 is a fragmentary plan of therotary disk and vanes on an enlarged scale. Fig. 5 is a side view of thesame, and Fig. 6 is a lide view of a bushing used with the turine.

The invention is shown in a form in which a shaft 10, carries a blower11 on one end. On the other end it is provided with a pair of separatedparallel circular plates 12 of sheet metal each having radial slits 13intersecting circular ones 14 to form vanes 15 projecting inwardlytherefrom. These vanes on the opposite sides of the rotor are staggeredso that each vane projects more than half way over the rotor into theconcave portion o-f the nearest vane on the other side. In this way itwill be seen that these vanes are formed integrally from the plates in avery simple manner and that the two plates being right and left, theycan be pressed into their exact forms with a set of dies almostinstantly, doing away with the insertion of blades in the rotor. Toincrease the power it is simply necessary to increase the diameter ofthe rotor or to set any number in one casing side by side, and boltedtogether. The plates 12 are held apart by a cylindrical body shown ascomposed of two circular sheet metal rings 16 and 17 against the outerone of which the vanes bear. This furnishes an exceedingly inexpensiveconstruction to make and one in which the weight of the parts is reducedto aminimum. The plates are held on the shaftby a shoulder 18 and nut19. This rotor with its vanes is designed to rotate in a casing formedof two end plates 20 and 21 and annulus 22 between them. One of the endplates is provided with a central cavity 23 having a plurality ofradially projecting extensions 24. In this case three of these are shownspaced equally around the circle. The annulus has cavities 25registering with the ends of the extensions 24. It also has a circularpassage 26 having ports 27 adjacent to one edge of each extension andopening into the space in which the vanes are located. The steam entersthrough a pipe 28 into the passage 26, and comes into the vanes throughthe ports 27. It is discharged at a plurality of points (in this case,three) through the cavities 25 and 23 into the exhaust pipe 29. It willbe seen therefore, that the turbine is constructed in an exceedinglysimple and inexpensive way and that it is comparatively etcient inoperation.

The shaft l0 is shown as mounted in a bushing 31 which is held by setscrews 32 in a bearing 33. This bushing is shown as of a cylindricalform but having a section 34 free from the body of the bushing along alongitudinal slit 35 and two transverse slits 36. This is to permit theset screws 32 to bear on this spring piece 34 and adjust it toward theshaft. Its natural resiliency holds it away from it. The oil is appliedthrough a hole 37 where it will spread into the slits so as to flowreadily to all parts of the bearing.

Although I have illustrated and described a preferred embodiment of theinvention, I am aware that many modifications can be made therein by anyperson skilled in the .art without departing from the scope of theinvention as expressed in the claims. Therefore, I do not wish to belimited to all the details of construction herein shown and described,but

`What I do claim is l. As an article of manufacture, a steam turbinerotor having on opposite sides thereof sheet metal plates having theiredges cut by radial and annular slits to form a plurality of inwardlyextending vanes.

2. As an article of manufacture, a steam turbine rotor having onopposite ends thereof a pair of circular plates each having its edgesslit and inwardly turned to forni flanges constituting vanes extendingradially from the edge of the rotor.

8. As an article of manufacture, a turbine rotor comprising a pair ofcircular plates spaced apart and each having a series of slits extendinginwardly, and alternately arranged on the two plates, the metal on oneside of each slit being bent inwardly toward the other plate.

4. As an article of manufacture, a turbine rotor comprising a rotarybody having a circular plate on the end thereof extending beyond thebody and having its edges beyond said body cut by annular and radialslits, the metal at one side of each slit being bent inwardly to form aseries of vanes around said body.

5. In a steam turbine, the combination with a rotor having inwardlyextending vanes circumferentially arranged around it alternately onopposite sides, of a. casing therefor comprising end plates, one havingexhaust passages, and an annulus between the end plates provided with acircular passage for steam and having a plurality of ports from saidpassage extending inwardly toward the vanes.

6. In a steam turbine, the combination of a casing comprising two endplates, one having a central depression provided with radial extensionstherefrom, an exhaust connected with said depression, an annulus betweensaid plates for receiving live steam and having ports extending inwardlytherefrom adjacent to one edge of each of said extensions, and a rotorwithin the casing and annulus provided with vanes on its circumferencein position to receive the steam from said ports.

In testimony whereof I have hereunto set mv hand, in the presence of twosubscribing witnesses.

EUGENE J MCCARTY. IVtnesses IVILLIAM I-I. DIETZMAN, ANNIE M. V.MGNAMARA.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

